The Effects of Aging Time on the Structural and Electrochemical Properties of Composite Coatings on CP-Ti Substrate

Çomakli O., Yazici M., Yetim T., Yetim A. F., ÇELİK A.

Journal of Bionic Engineering, cilt.14, sa.3, ss.532-539, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14 Sayı: 3
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/s1672-6529(16)60419-5
  • Dergi Adı: Journal of Bionic Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.532-539
  • Anahtar Kelimeler: bioinspired TiO2-SiO2 coatings, CP-Ti substrate, electrochemical properties, sol-gel, SOL-GEL COATINGS, CORROSION BEHAVIOR, CALCINATION TEMPERATURES, MECHANICAL-PROPERTIES, PROTECTION, FILMS, SBF
  • Atatürk Üniversitesi Adresli: Evet

Özet

TiO2-SiO2 composite films were produced on commercially pure titanium (CP-Ti) substrate by a sol gel method to investigate the behavior of sol aging time and its potential effects on the structural and electrochemical properties of composite coatings. Anatase-TiO2 and quartz-SiO2 peaks were observed on all composite coated samples according to XRD results. It was observed that the average grain size increased with sol aging time. Also, the average smallest grain size was seen at composite coatings prepared from unaged sol according to the width of the peaks. Electrochemical behavior of coated samples was mainly investigated by potentiodynamic polarization and Electrochemical Impedance Spectroscopy (EIS) in Simulated Body Fluid (SBF) solution. In corrosion tests, the composite coatings showed better anti-corrosion behavior than that of uncoated samples. In addition, the corrosion properties of the composite films were considerably affected by sol aging time. Corrosion resistance of coatings decreased with increasing aging time and the best result was obtained from composite coatings prepared from unaged sol.